Naval Bronze C46400 Unwrought Plates from Germany
Unwrought naval bronze C46400 cast plates with 39-42% zinc and 5% tin, but tin content controls classification as copper-tin base per note (b) allowance for zinc up to 10% when tin ≥3%. Traditional propeller and valve alloy.
Duty Rate — Germany → United States
1%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Note allows zinc up to 10% in bronzes; document this explicitly to prevent brass reclassification
• Propeller manufacturers often require MIL-SPEC certification; include with commercial invoice
• Beware Form 3229 requirements for alloys destined for defense contractors